Bed and cylinder printing press



April 18, 1933. c. B. COTTRELL. 3D

BED AND CYLINDER PRINTING PRESS Filed May 16, 1931 v INVENTOR M ATTORNEYS Patented Apr. 18, 1933 N ED-1 S A O I E cnrlvnn'r i3. comma. 3 1 5, orj wnsrnRLY, mronn nssrenon To c. B. cor'rrnnm. V r sons COMPANY; or wnsrnnny, RHODE rspnnnfn oonroRnTIoN or. Dnrnwenn H .BEn Ann CYLINDER 3mins .rnnss Application filed'May is,

One object of my invention-=is'to provide means for more evenly inking the form on the bed of a bed and cylinder printing mechanism where the form and its bedrec'iprocate in a right line, said means including an inking mechanism having its distributing and form rollers driven continuously in one direction independently of the .bed drive, said form rollers being automatically raised outof the path of the form on one stroke of the bed.

A practical embodiment of my invention is represented in the accompanying drawing in which: e

Fig. 1 represents a side elevation of my improved bed and cylinder printing press,

the parts being shown in full lines in the posi-' tions they assume just after the bed and cylinder have started on their forward or printing stroke, and in dotted lines in the positions the parts assume at the end of thesaid forward.

or printing stroke;

Fig.2 represents a diagrammatic view of the impression cylinder and its adjacent parts in the positions they assume just as the impression cylinder has started on the first revolution of its forward or printing stroke and has taken at its under side a sheet from printed sheethas been transferred from the cylinder. j I

The. main frame of the printing press is denoted by 1. The form bed 2 and itsform 3 are fitted to reciprocate in a right line in the main frame. The inking mechanism for the form is shown as comprising an ink fountain 4, distributing rollers 5, -form rollers 6 and anelectric motor 7, which motor isindependent of the bed reciprocating means and 19 31: Serial no. 537,794. 7

drivesboth the distributing rollers 5 and the form rollers 6' continuouslyin one direction, ,to ensure an evenapplication'of the ink to the form 3, in the present instance on the revers or non-printing stroke of the bed. t

a 7 Any suitable means may be provided for lowering the. form rollers 6 offthe inking mechanism into-position to. ink the form :3

.ontheflreverse'or non-printing strokeof the bed,land for raising the form rollers 6 out of position to ink-the form 3 on the forward or printingstroke of=the bed. "Inthe present instance said form roller raising and loweringmeans includes a'cam plate 8 ,With.yield ing oppositely disposed end members 9,110.

a The oscillating impression cylinder ;is denoted by '11 and its grippers by 12. This cylinder :is driven in' the usual manner from the reciprocatingbed by the gear and rack 13, 1 1, ,the relation of the diameter of the cy inder to the movement of the bed being such thatthe (cylinder is oscillated about one and one-half revolutions on each ofits strokes. :Thisimpression cylinder is raised out of contact ,with. the arm 3 on thereturn ,ornon-printing stroke ofthe bed by the usual mechanism denotedjby 15..

The feeder for the ates is a otziby 16 and itmaybeof any well known. or approved form. This feeder is arranged to feed the sheets to the under side, of the impression cylinder 11 andit is provided with;the;usual V stopl'Z which maybeoperated: at, the proper timeb-y. the usual 'mechanism, not shown here'- -.in, to. feed thel sheet to the; grippers 12.

. The sheetdeliveryinechanism mayflbe of any well knownor-approved form, that shown herein comp ising a sheet stripper 18, I the endless sheet carrier 19 and the coactingsheet dieliverygrolls 2 0, 21. j-mht sheet deliveryltable .is denotedi-by l 22. .Tlrefsheet stripper 1 8 is -arranged to strip the printed sheetjtail (end fi stqfpp i s o theiimpr ssiqn cylinderinimediatelyafter thestart of [the reverse; or non-printing strokeofthe cylinder. The; operation of the printingpress is as follows: As thef-orm bed and impression cylinder are started on their, forward, or printing strokethe'impression cylinder grippers 12 ,Y V ll.v b %-91Q 'Qi h ea end-h a he t f d from the feeder 16 and released by the sheet stop 17. As the bed and its form are moved in a right line to the end of their forward or printing stroke the impression cylinder will be rotated about one and one-half revolutions to bring the. tail end of the printed sheet slightly beyond its transfer point to the delivery mechanism as shown in Fig. 3.

' As the bed and cylinder are started on their reverse or non-printing'stroke the impression cylinder 11 is raised by the 'mechani'sm'15'out of. position to contact with the form,..which movement also brings the stripper l8'ii1to position to strip the tail end 'ofthe printed sheet from the cylinder and direct it printed side 'up to the coacting rolls 20, 210i the delivery mechanism, which rolls then take control of 'the sh'eet. At the same time the form rollers '6 of'the inking mechanism are lowered into position to contact with the form andink the same. When the impression'cy-linder has rotated a'shortdistance on its reverse stroke, in the present instance about one-half of a revolution, the grippers 12"are-'opened'to release'the head end of the printed sheet. These grippersare permitted to remain opendurin'g-th'e remainder of the reverse or non-printingfstroke of the impression cylinder.

From thea'b'ove descri tion'it wi]l be seen meansforra'ising'the form rollers out of the path of the form on the printing stroke of the bed.

In --testimony, that I claim the foregoing as my invention, Ihave si'gnedimyname. this 13th day, of-'May, 1931.. v

' CALVERT B. GQTTRELL, 3D.

that I have provided an inking mechanism for r the above type of printing press in which the distributing and form rollers may be driven continuously in one directionindependently of the-bed drive and in which the form rollas may be raised and lowered out of 'a'ndinto -theirf0rm=inking position. Thiscontinuous drive in one direction of the'distribut'ing and form rollers ensures a very even application of the ink to the form.

It ise'vident' that various changes maybe resorted to in the construction; form and arrangement of the several'parts without depar-ting from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown described; i

What I claim is 7 1. In'abed and cylinder printing press, a bed and its form reciprocating in a right line, an ink-ing'mechanism including distributing andform rollers, means independent of'the beddrive for driving the said rollers continuously in one direction only, and means for raising the form rollers out of the path "of the form onone stroke of the bed.

2; Ina bed and'cylinder printing press, a

bed and its lit'orm reciprocating in a right line, an inking mechanism including distributingi and; form rollers, means independent of the bed drivevfor driving the said rollers in one direction only, and means for raising 'the form rollers out of the path of the form 'on the printing stroke of the bed.

3; Ina bed and cylinder printing pressm bed a'n'd its form reciprocating in a right line, 

